add program to evaluate the pixel-wise variation over a set of images
add some test data
refine search for DCMTK libraries
more updates to the 3D DICOM reading
add functions to erase attributes and get values directly
add support for loading 3D sets from DICOM
loading of 3D data from DICOM works
make test of uninstalled code run
clean up source tree
rename to prepare 3D implementation
